diff -r 000000000000 -r 92d00ff32c56 utils.rb
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/utils.rb	Fri Aug 15 15:43:38 2008 +0000
@@ -0,0 +1,738 @@
+#
+#	Install/distribution utility functions
+#	$Id$
+#
+#	Copyright (c) 2001-2005, The FaerieMUD Consortium.
+#
+#	This is free software. You may use, modify, and/or redistribute this
+#	software under the terms of the Perl Artistic License. (See
+#	http://language.perl.com/misc/Artistic.html)
+#
+
+BEGIN {
+	require 'rbconfig'
+	require 'uri'
+	require 'find'
+	require 'pp'
+
+	begin
+		require 'readline'
+		include Readline
+	rescue LoadError => e
+		$stderr.puts "Faking readline..."
+		def readline( prompt )
+			$stderr.print prompt.chomp
+			return $stdin.gets.chomp
+		end
+	end
+
+	begin
+		require 'yaml'
+		$yaml = true
+	rescue LoadError => e
+		$stderr.puts "No YAML; try() will use PrettyPrint instead."
+		$yaml = false
+	end
+}
+
+
+module UtilityFunctions
+	include Config
+
+	# The list of regexen that eliminate files from the MANIFEST
+	ANTIMANIFEST = [
+		/makedist\.rb/,
+		/\bCVS\b/,
+		/~$/,
+		/^#/,
+		%r{docs/html},
+		%r{docs/man},
+		/\bTEMPLATE\.\w+\.tpl\b/,
+		/\.cvsignore/,
+		/\.s?o$/,
+	]
+
+	# Set some ANSI escape code constants (Shamelessly stolen from Perl's
+	# Term::ANSIColor by Russ Allbery <rra@stanford.edu> and Zenin <zenin@best.com>
+	AnsiAttributes = {
+		'clear'      => 0,
+		'reset'      => 0,
+		'bold'       => 1,
+		'dark'       => 2,
+		'underline'  => 4,
+		'underscore' => 4,
+		'blink'      => 5,
+		'reverse'    => 7,
+		'concealed'  => 8,
+
+		'black'      => 30,   'on_black'   => 40, 
+		'red'        => 31,   'on_red'     => 41, 
+		'green'      => 32,   'on_green'   => 42, 
+		'yellow'     => 33,   'on_yellow'  => 43, 
+		'blue'       => 34,   'on_blue'    => 44, 
+		'magenta'    => 35,   'on_magenta' => 45, 
+		'cyan'       => 36,   'on_cyan'    => 46, 
+		'white'      => 37,   'on_white'   => 47
+	}
+
+	ErasePreviousLine = "\033[A\033[K"
+
+	ManifestHeader = (<<-"EOF").gsub( /^\t+/, '' )
+		#
+		# Distribution Manifest
+		# Created: #{Time::now.to_s}
+		# 
+
+	EOF
+
+	###############
+	module_function
+	###############
+
+	# Create a string that contains the ANSI codes specified and return it
+	def ansiCode( *attributes )
+		return '' unless /(?:vt10[03]|xterm(?:-color)?|linux|screen)/i =~ ENV['TERM']
+		attr = attributes.collect {|a| AnsiAttributes[a] ? AnsiAttributes[a] : nil}.compact.join(';')
+		if attr.empty? 
+			return ''
+		else
+			return "\e[%sm" % attr
+		end
+	end
+
+	# Test for the presence of the specified <tt>library</tt>, and output a
+	# message describing the test using <tt>nicename</tt>. If <tt>nicename</tt>
+	# is <tt>nil</tt>, the value in <tt>library</tt> is used to build a default.
+	def testForLibrary( library, nicename=nil, progress=false )
+		nicename ||= library
+		message( "Testing for the #{nicename} library..." ) if progress
+		if $LOAD_PATH.detect {|dir|
+				File.exists?(File.join(dir,"#{library}.rb")) ||
+				File.exists?(File.join(dir,"#{library}.#{CONFIG['DLEXT']}"))
+			}
+			message( "found.\n" ) if progress
+			return true
+		else
+			message( "not found.\n" ) if progress
+			return false
+		end
+	end
+
+	# Test for the presence of the specified <tt>library</tt>, and output a
+	# message describing the problem using <tt>nicename</tt>. If
+	# <tt>nicename</tt> is <tt>nil</tt>, the value in <tt>library</tt> is used
+	# to build a default. If <tt>raaUrl</tt> and/or <tt>downloadUrl</tt> are
+	# specified, they are also use to build a message describing how to find the
+	# required library. If <tt>fatal</tt> is <tt>true</tt>, a missing library
+	# will cause the program to abort.
+	def testForRequiredLibrary( library, nicename=nil, raaUrl=nil, downloadUrl=nil, fatal=true )
+		nicename ||= library
+		unless testForLibrary( library, nicename )
+			msgs = [ "You are missing the required #{nicename} library.\n" ]
+			msgs << "RAA: #{raaUrl}\n" if raaUrl
+			msgs << "Download: #{downloadUrl}\n" if downloadUrl
+			if fatal
+				abort msgs.join('')
+			else
+				errorMessage msgs.join('')
+			end
+		end
+		return true
+	end
+
+	### Output <tt>msg</tt> as a ANSI-colored program/section header (white on
+	### blue).
+	def header( msg )
+		msg.chomp!
+		$stderr.puts ansiCode( 'bold', 'white', 'on_blue' ) + msg + ansiCode( 'reset' )
+		$stderr.flush
+	end
+
+	### Output <tt>msg</tt> to STDERR and flush it.
+	def message( *msgs )
+		$stderr.print( msgs.join("\n") )
+		$stderr.flush
+	end
+
+	### Output +msg+ to STDERR and flush it if $VERBOSE is true.
+	def verboseMsg( msg )
+		msg.chomp!
+		message( msg + "\n" ) if $VERBOSE
+	end
+
+	### Output the specified <tt>msg</tt> as an ANSI-colored error message
+	### (white on red).
+	def errorMessage( msg )
+		message ansiCode( 'bold', 'white', 'on_red' ) + msg + ansiCode( 'reset' )
+	end
+
+	### Output the specified <tt>msg</tt> as an ANSI-colored debugging message
+	### (yellow on blue).
+	def debugMsg( msg )
+		return unless $DEBUG
+		msg.chomp!
+		$stderr.puts ansiCode( 'bold', 'yellow', 'on_blue' ) + ">>> #{msg}" + ansiCode( 'reset' )
+		$stderr.flush
+	end
+
+	### Erase the previous line (if supported by your terminal) and output the
+	### specified <tt>msg</tt> instead.
+	def replaceMessage( msg )
+		$stderr.print ErasePreviousLine
+		message( msg )
+	end
+
+	### Output a divider made up of <tt>length</tt> hyphen characters.
+	def divider( length=75 )
+		$stderr.puts "\r" + ("-" * length )
+	end
+	alias :writeLine :divider
+
+
+	### Output the specified <tt>msg</tt> colored in ANSI red and exit with a
+	### status of 1.
+	def abort( msg )
+		print ansiCode( 'bold', 'red' ) + "Aborted: " + msg.chomp + ansiCode( 'reset' ) + "\n\n"
+		Kernel.exit!( 1 )
+	end
+
+
+	### Output the specified <tt>promptString</tt> as a prompt (in green) and
+	### return the user's input with leading and trailing spaces removed.  If a
+	### test is provided, the prompt will repeat until the test returns true.
+	### An optional failure message can also be passed in.
+	def prompt( promptString, failure_msg="Try again." ) # :yields: response
+		promptString.chomp!
+		response = nil
+
+		begin
+			response = readline( ansiCode('bold', 'green') +
+				"#{promptString}: " + ansiCode('reset') ).strip
+			if block_given? && ! yield( response ) 
+				errorMessage( failure_msg + "\n\n" )
+				response = nil
+			end
+		end until response
+
+		return response
+	end
+
+
+	### Prompt the user with the given <tt>promptString</tt> via #prompt,
+	### substituting the given <tt>default</tt> if the user doesn't input
+	### anything.  If a test is provided, the prompt will repeat until the test
+	### returns true.  An optional failure message can also be passed in.
+	def promptWithDefault( promptString, default, failure_msg="Try again." )
+		response = nil
+		
+		begin
+			response = prompt( "%s [%s]" % [ promptString, default ] )
+			response = default if response.empty?
+
+			if block_given? && ! yield( response ) 
+				errorMessage( failure_msg + "\n\n" )
+				response = nil
+			end
+		end until response
+
+		return response
+	end
+
+
+	$programs = {}
+
+	### Search for the program specified by the given <tt>progname</tt> in the
+	### user's <tt>PATH</tt>, and return the full path to it, or <tt>nil</tt> if
+	### no such program is in the path.
+	def findProgram( progname )
+		unless $programs.key?( progname )
+			ENV['PATH'].split(File::PATH_SEPARATOR).each {|d|
+				file = File.join( d, progname )
+				if File.executable?( file )
+					$programs[ progname ] = file 
+					break
+				end
+			}
+		end
+
+		return $programs[ progname ]
+	end
+
+
+	### Search for the release version for the project in the specified
+	### +directory+.
+	def extractVersion( directory='.' )
+		release = nil
+
+		Dir::chdir( directory ) do
+			if File::directory?( "CVS" )
+				verboseMsg( "Project is versioned via CVS. Searching for RELEASE_*_* tags..." )
+
+				if (( cvs = findProgram('cvs') ))
+					revs = []
+					output = %x{cvs log}
+					output.scan( /RELEASE_(\d+(?:_\d\w+)*)/ ) {|match|
+						rev = $1.split(/_/).collect {|s| Integer(s) rescue 0}
+						verboseMsg( "Found %s...\n" % rev.join('.') )
+						revs << rev
+					}
+
+					release = revs.sort.last
+				end
+
+			elsif File::directory?( '.svn' )
+				verboseMsg( "Project is versioned via Subversion" )
+
+				if (( svn = findProgram('svn') ))
+					output = %x{svn pg project-version}.chomp
+					unless output.empty?
+						verboseMsg( "Using 'project-version' property: %p" % output )
+						release = output.split( /[._]/ ).collect {|s| Integer(s) rescue 0}
+					end
+				end
+			end
+		end
+
+		return release
+	end
+
+
+	### Find the current release version for the project in the specified
+	### +directory+ and return its successor.
+	def extractNextVersion( directory='.' )
+		version = extractVersion( directory ) || [0,0,0]
+		version.compact!
+		version[-1] += 1
+
+		return version
+	end
+
+
+	# Pattern for extracting the name of the project from a Subversion URL
+	SVNUrlPath = %r{
+		.*/						# Skip all but the last bit
+		([^/]+)					# $1 = project name
+		/						# Followed by / +
+		(?:
+			trunk |				# 'trunk'
+			(
+				branches |		# ...or branches/branch-name
+				tags			# ...or tags/tag-name
+			)/\w	
+		)
+		$						# bound to the end
+	}ix
+
+	### Extract the project name (CVS Repository name) for the given +directory+.
+	def extractProjectName( directory='.' )
+		name = nil
+
+		Dir::chdir( directory ) do
+
+			# CVS-controlled
+			if File::directory?( "CVS" )
+				verboseMsg( "Project is versioned via CVS. Using repository name." )
+				name = File.open( "CVS/Repository", "r").readline.chomp
+				name.sub!( %r{.*/}, '' )
+
+			# Subversion-controlled
+			elsif File::directory?( '.svn' )
+				verboseMsg( "Project is versioned via Subversion" )
+
+				# If the machine has the svn tool, try to get the project name
+				if (( svn = findProgram( 'svn' ) ))
+
+					# First try an explicit property
+					output = shellCommand( svn, 'pg', 'project-name' )
+					if !output.empty?
+						verboseMsg( "Using 'project-name' property: %p" % output )
+						name = output.first.chomp
+
+					# If that doesn't work, try to figure it out from the URL
+					elsif (( uri = getSvnUri() ))
+						name = uri.path.sub( SVNUrlPath ) { $1 }
+					end
+				end
+			end
+
+			# Fall back to guessing based on the directory name
+			unless name
+				name = File::basename(File::dirname( File::expand_path(__FILE__) ))
+			end
+		end
+
+		return name
+	end
+
+
+	### Extract the Subversion URL from the specified directory and return it as
+	### a URI object.
+	def getSvnUri( directory='.' )
+		uri = nil
+
+		Dir::chdir( directory ) do
+			output = %x{svn info}
+			debugMsg( "Using info: %p" % output )
+
+			if /^URL: \s* ( .* )/xi.match( output )
+				uri = URI::parse( $1 )
+			end
+		end
+
+		return uri
+	end
+
+
+	### (Re)make a manifest file in the specified +path+.
+	def makeManifest( path="MANIFEST" )
+		if File::exists?( path )
+			reply = promptWithDefault( "Replace current '#{path}'? [yN]", "n" )
+			return false unless /^y/i.match( reply )
+
+			verboseMsg "Replacing manifest at '#{path}'"
+		else
+			verboseMsg "Creating new manifest at '#{path}'"
+		end
+
+		files = []
+		verboseMsg( "Finding files...\n" )
+		Find::find( Dir::pwd ) do |f|
+			Find::prune if File::directory?( f ) &&
+				/^\./.match( File::basename(f) )
+			verboseMsg( "  found: #{f}\n" )
+			files << f.sub( %r{^#{Dir::pwd}/?}, '' )
+		end
+		files = vetManifest( files )
+		
+		verboseMsg( "Writing new manifest to #{path}..." )
+		File::open( path, File::WRONLY|File::CREAT|File::TRUNC ) do |ofh|
+			ofh.puts( ManifestHeader )
+			ofh.puts( files )
+		end
+		verboseMsg( "done." )
+	end
+
+
+	### Read the specified <tt>manifestFile</tt>, which is a text file
+	### describing which files to package up for a distribution. The manifest
+	### should consist of one or more lines, each containing one filename or
+	### shell glob pattern.
+	def readManifest( manifestFile="MANIFEST" )
+		verboseMsg "Building manifest..."
+		raise "Missing #{manifestFile}, please remake it" unless File.exists? manifestFile
+
+		manifest = IO::readlines( manifestFile ).collect {|line|
+			line.chomp
+		}.select {|line|
+			line !~ /^(\s*(#.*)?)?$/
+		}
+
+		filelist = []
+		for pat in manifest
+			verboseMsg "Adding files that match '#{pat}' to the file list"
+			filelist |= Dir.glob( pat ).find_all {|f| FileTest.file?(f)}
+		end
+
+		verboseMsg "found #{filelist.length} files.\n"
+		return filelist
+	end
+
+
+	### Given a <tt>filelist</tt> like that returned by #readManifest, remove
+	### the entries therein which match the Regexp objects in the given
+	### <tt>antimanifest</tt> and return the resultant Array.
+	def vetManifest( filelist, antimanifest=ANTIMANIFEST )
+		origLength = filelist.length
+		verboseMsg "Vetting manifest..."
+
+		for regex in antimanifest
+			verboseMsg "\n\tPattern /#{regex.source}/ removed: " +
+				filelist.find_all {|file| regex.match(file)}.join(', ')
+			filelist.delete_if {|file| regex.match(file)}
+		end
+
+		verboseMsg "removed #{origLength - filelist.length} files from the list.\n"
+		return filelist
+	end
+
+
+	### Combine a call to #readManifest with one to #vetManifest.
+	def getVettedManifest( manifestFile="MANIFEST", antimanifest=ANTIMANIFEST )
+		vetManifest( readManifest(manifestFile), antimanifest )
+	end
+
+
+	### Given a documentation <tt>catalogFile</tt>, extract the title, if
+	### available, and return it. Otherwise generate a title from the name of
+	### the CVS module.
+	def findRdocTitle( catalogFile="docs/CATALOG" )
+
+		# Try extracting it from the CATALOG file from a line that looks like:
+		# Title: Foo Bar Module
+		title = findCatalogKeyword( 'title', catalogFile )
+
+		# If that doesn't work for some reason, use the name of the project.
+		title = extractProjectName()
+
+		return title
+	end
+
+
+	### Given a documentation <tt>catalogFile</tt>, extract the name of the file
+	### to use as the initally displayed page. If extraction fails, the
+	### +default+ will be used if it exists. Returns +nil+ if there is no main
+	### file to be found.
+	def findRdocMain( catalogFile="docs/CATALOG", default="README" )
+
+		# Try extracting it from the CATALOG file from a line that looks like:
+		# Main: Foo Bar Module
+		main = findCatalogKeyword( 'main', catalogFile )
+
+		# Try to make some educated guesses if that doesn't work
+		if main.nil?
+			basedir = File::dirname( __FILE__ )
+			basedir = File::dirname( basedir ) if /docs$/ =~ basedir
+			
+			if File::exists?( File::join(basedir, default) )
+				main = default
+			end
+		end
+
+		return main
+	end
+
+
+	### Given a documentation <tt>catalogFile</tt>, extract an upload URL for
+	### RDoc.
+	def findRdocUpload( catalogFile="docs/CATALOG" )
+		findCatalogKeyword( 'upload', catalogFile )
+	end
+
+
+	### Given a documentation <tt>catalogFile</tt>, extract a CVS web frontend
+	### URL for RDoc.
+	def findRdocCvsURL( catalogFile="docs/CATALOG" )
+		findCatalogKeyword( 'webcvs', catalogFile )
+	end
+
+
+	### Find one or more 'accessor' directives in the catalog if they exist and
+	### return an Array of them.
+	def findRdocAccessors( catalogFile="docs/CATALOG" )
+		accessors = []
+		in_attr_section = false
+		indent = ''
+
+		if File::exists?( catalogFile )
+			verboseMsg "Extracting accessors from CATALOG file (%s).\n" % catalogFile
+
+			# Read lines from the catalog
+			File::foreach( catalogFile ) do |line|
+				debugMsg( "  Examining line #{line.inspect}..." )
+
+				# Multi-line accessors
+				if in_attr_section
+					if /^#\s+([a-z0-9_]+(?:\s*=\s*.*)?)$/i.match( line )
+						debugMsg( "    Found accessor: #$1" )
+						accessors << $1
+						next
+					end
+
+					debugMsg( "  End of accessors section." )
+					in_attr_section = false
+
+				# Single-line accessor
+				elsif /^#\s*Accessors:\s*(\S+)$/i.match( line )
+					debugMsg( "  Found single accessors line: #$1" )
+					vals = $1.split(/,/).collect {|val| val.strip }
+					accessors.replace( vals )
+
+				# Multi-line accessor header
+				elsif /^#\s*Accessors:\s*$/i.match( line )
+					debugMsg( "  Start of accessors section." )
+					in_attr_section = true
+				end
+
+			end
+		end
+
+		debugMsg( "Found accessors: %s" % accessors.join(",") )
+		return accessors
+	end
+
+		
+	### Given a documentation <tt>catalogFile</tt>, try extracting the given
+	### +keyword+'s value from it. Keywords are lines that look like:
+	###   # <keyword>: <value>
+	### Returns +nil+ if the catalog file was unreadable or didn't contain the
+	### specified +keyword+.
+	def findCatalogKeyword( keyword, catalogFile="docs/CATALOG" )
+		val = nil
+
+		if File::exists? catalogFile
+			verboseMsg "Extracting '#{keyword}' from CATALOG file (%s).\n" % catalogFile
+			File::foreach( catalogFile ) do |line|
+				debugMsg( "Examining line #{line.inspect}..." )
+				val = $1.strip and break if /^#\s*#{keyword}:\s*(.*)$/i.match( line )
+			end
+		end
+
+		return val
+	end
+
+
+	### Given a documentation <tt>catalogFile</tt>, which is in the same format
+	### as that described by #readManifest, read and expand it, and then return
+	### a list of those files which appear to have RDoc documentation in
+	### them. If <tt>catalogFile</tt> is nil or does not exist, the MANIFEST
+	### file is used instead.
+	def findRdocableFiles( catalogFile="docs/CATALOG" )
+		startlist = []
+		if File.exists? catalogFile
+			verboseMsg "Using CATALOG file (%s).\n" % catalogFile
+			startlist = getVettedManifest( catalogFile )
+		else
+			verboseMsg "Using default MANIFEST\n"
+			startlist = getVettedManifest()
+		end
+
+		verboseMsg "Looking for RDoc comments in:\n"
+		startlist.select {|fn|
+			verboseMsg "  #{fn}: "
+			found = false
+			File::open( fn, "r" ) {|fh|
+				fh.each {|line|
+					if line =~ /^(\s*#)?\s*=/ || line =~ /:\w+:/ || line =~ %r{/\*}
+						found = true
+						break
+					end
+				}
+			}
+
+			verboseMsg( (found ? "yes" : "no") + "\n" )
+			found
+		}
+	end
+
+
+	### Open a file and filter each of its lines through the given block a
+	### <tt>line</tt> at a time. The return value of the block is used as the
+	### new line, or omitted if the block returns <tt>nil</tt> or
+	### <tt>false</tt>.
+	def editInPlace( file, testMode=false ) # :yields: line
+		raise "No block specified for editing operation" unless block_given?
+
+		tempName = "#{file}.#{$$}"
+		File::open( tempName, File::RDWR|File::CREAT, 0600 ) {|tempfile|
+			File::open( file, File::RDONLY ) {|fh|
+				fh.each {|line|
+					newline = yield( line ) or next
+					tempfile.print( newline )
+					$deferr.puts "%p -> %p" % [ line, newline ] if
+						line != newline
+				}
+			}
+		}
+
+		if testMode
+			File::unlink( tempName )
+		else
+			File::rename( tempName, file )
+		end
+	end
+
+
+	### Execute the specified shell <tt>command</tt>, read the results, and
+	### return them. Like a %x{} that returns an Array instead of a String.
+	def shellCommand( *command )
+		raise "Empty command" if command.empty?
+
+		cmdpipe = IO::popen( command.join(' '), 'r' )
+		return cmdpipe.readlines
+	end
+
+
+	### Execute a block with $VERBOSE set to +false+, restoring it to its
+	### previous value before returning.
+	def verboseOff
+		raise LocalJumpError, "No block given" unless block_given?
+
+		thrcrit = Thread.critical
+		oldverbose = $VERBOSE
+		begin
+			Thread.critical = true
+			$VERBOSE = false
+			yield
+		ensure
+			$VERBOSE = oldverbose
+			Thread.critical = false
+		end
+	end
+
+
+	### Try the specified code block, printing the given 
+	def try( msg, bind=TOPLEVEL_BINDING )
+		result = ''
+		if msg =~ /^to\s/
+			message "Trying #{msg}...\n"
+		else
+			message msg + "\n"
+		end
+			
+		begin
+			rval = nil
+			if block_given?
+				rval = yield
+			else
+				file, line = caller(1)[0].split(/:/,2)
+				rval = eval( msg, bind, file, line.to_i )
+			end
+
+			if $yaml
+				result = rval.to_yaml
+			else
+				PP.pp( rval, result )
+			end
+
+		rescue Exception => err
+			if err.backtrace
+				nicetrace = err.backtrace.delete_if {|frame|
+					/in `(try|eval)'/ =~ frame
+				}.join("\n\t")
+			else
+				nicetrace = "Exception had no backtrace"
+			end
+
+			result = err.message + "\n\t" + nicetrace
+		ensure
+			divider
+			message result.chomp + "\n"
+			divider
+			$deferr.puts
+		end
+	end
+end
+
+
+if __FILE__ == $0
+	# $DEBUG = true
+	include UtilityFunctions
+
+	projname = extractProjectName()
+	header "Project: #{projname}"
+
+	ver = extractVersion() || [0,0,1]
+	puts "Version: %s\n" % ver.join('.')
+
+	if File::directory?( "docs" )
+		puts "Rdoc:",
+			"  Title: " + findRdocTitle(),
+			"  Main: " + findRdocMain(),
+			"  Upload: " + findRdocUpload(),
+			"  SCCS URL: " + findRdocCvsURL(),
+			"  Accessors: " + findRdocAccessors().join(",")
+	end
+
+	puts "Manifest:",
+		"  " + getVettedManifest().join("\n  ")
+end